APA (7th ed.) Citation

Douglas, M. M., & Douglas, J. M. (2005). Butterflies of the Great Lakes Region. University of Michigan Press.

Chicago Style (17th ed.) Citation

Douglas, Matthew M., and Jonathan M. Douglas. Butterflies of the Great Lakes Region. Ann Arbor: University of Michigan Press, 2005.

MLA (8th ed.) Citation

Douglas, Matthew M., and Jonathan M. Douglas. Butterflies of the Great Lakes Region. University of Michigan Press, 2005.